山地城市排水管网特细颗粒物特性及变化规律

对山地城市排水管网中特细颗粒物的粒径分布特征及变化规律、Zeta电位分布特征及变化规律和ρ(SS)的变化规律进行研究,同时对相关水化学参数(如电导率、pH)的变化规律进行了分析.结果表明:特细颗粒物的平均粒径、Zeta电位、ρ(SS)和电导率分别为21.04～73.53μm、-20.83～-11.15 mV、106～492 mg/L和973～2 445μS/cm,其统计平均值分别为(43.74±14.12)μm、(-17.95±1.88)mV、(233±90)mg/L和(1 343±331)μS/cm;pH为7.25～7.63.工业废水的排入对排水管网特细颗粒物的粒径分布特征、Zeta电位分布特征以及电导率有显著的影响并呈现出一定的规律性;传统沉砂池对进水中特细颗粒物的去除能力相当有限,特细颗粒物会直接进入生物处理系统. 

Characteristics and Variation of Superfine Particles in a Drainage Pipe Network of a Mountainous City

The size distribution characteristics,Zeta potential and ρ(SS) of superfine particles in the drainage pipe network of a mountainous city were investigated.The chemical parameters of the wastewater,such as electric conductivity and pH,were also analyzed.The results showed that particle size,Zeta potential,ρ(SS) and conductivity ranged from 21.04-73.53 μm,-20.83--11.15 mV,106-492 mg/L,and 973-2445 μS/cm,respectively.The average values of these parameters were(43.74±14.12)μm,(-17.95±1.88)mV,(233±90)mg/L,and(1343±331)μS/cm,respectively.The pH ranged from 7.25 to 7.63.According to the results,industrial wastewater had a significant and regular impact on the size distribution and Zeta potential of superfine particles in the drainage pipe network.In addition,superfine particles could be directly carried into biological treatment systems because of the limited removal ability of the traditional grit chamber on superfine particles.